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Hexagon (target/hexagon) Clean up handling of modifier registers 

Currently, the register number (MuN) for modifier registers is the
modifier register number rather than the index into hex_gpr.  This
patch changes MuN to the hex_gpr index, which is consistent with
the handling of control registers.

Note that HELPER(fcircadd) needs the CS register corresponding to the
modifier register specified in the instruction.  We create a TCGv
variable "CS" to hold the value to pass to the helper.

Reviewed-by: Brian Cain <bcain@quicinc.com>
Signed-off-by: Taylor Simpson <ltaylorsimpson@gmail.com>
Message-Id: <20231210220712.491494-2-ltaylorsimpson@gmail.com>
Signed-off-by: Brian Cain <bcain@quicinc.com>
This commit is contained in:
Taylor Simpson 2023-12-10 15:07:04 -07:00 committed by Brian Cain
parent ccdae09a80
commit 421b53d589
4 changed files with 17 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
target/hexagon/gen_tcg.h
View File

@ -68,15 +68,14 @@
do { \
TCGv tcgv_siV = tcg_constant_tl(siV); \
tcg_gen_mov_tl(EA, RxV); \
gen_helper_fcircadd(RxV, RxV, tcgv_siV, MuV, \
hex_gpr[HEX_REG_CS0 + MuN]); \
gen_helper_fcircadd(RxV, RxV, tcgv_siV, MuV, CS); \
} while (0)
#define GET_EA_pcr(SHIFT) \
do { \
TCGv ireg = tcg_temp_new(); \
tcg_gen_mov_tl(EA, RxV); \
gen_read_ireg(ireg, MuV, (SHIFT)); \
gen_helper_fcircadd(RxV, RxV, ireg, MuV, hex_gpr[HEX_REG_CS0 + MuN]); \
gen_helper_fcircadd(RxV, RxV, ireg, MuV, CS); \
} while (0)
/* Instructions with multiple definitions */
@ -113,7 +112,7 @@
TCGv ireg = tcg_temp_new(); \
tcg_gen_mov_tl(EA, RxV); \
gen_read_ireg(ireg, MuV, SHIFT); \
gen_helper_fcircadd(RxV, RxV, ireg, MuV, hex_gpr[HEX_REG_CS0 + MuN]); \
gen_helper_fcircadd(RxV, RxV, ireg, MuV, CS); \
LOAD; \
} while (0)
@ -427,7 +426,7 @@
TCGv BYTE G_GNUC_UNUSED = tcg_temp_new(); \
tcg_gen_mov_tl(EA, RxV); \
gen_read_ireg(ireg, MuV, SHIFT); \
gen_helper_fcircadd(RxV, RxV, ireg, MuV, hex_gpr[HEX_REG_CS0 + MuN]); \
gen_helper_fcircadd(RxV, RxV, ireg, MuV, CS); \
STORE; \
} while (0)

13
target/hexagon/gen_tcg_funcs.py
View File

@ -99,10 +99,15 @@ def genptr_decl(f, tag, regtype, regid, regno):
hex_common.bad_register(regtype, regid)
elif regtype == "M":
if regid == "u":
f.write(f" const int {regtype}{regid}N = " f"insn->regno[{regno}];\n")
f.write(
f" TCGv {regtype}{regid}V = hex_gpr[{regtype}{regid}N + "
"HEX_REG_M0];\n"
f" const int {regN} = insn->regno[{regno}] + HEX_REG_M0;\n"
)
f.write(
f" TCGv {regtype}{regid}V = hex_gpr[{regN}];\n"
)
f.write(
f" TCGv CS G_GNUC_UNUSED = "
f"hex_gpr[{regN} - HEX_REG_M0 + HEX_REG_CS0];\n"
)
else:
hex_common.bad_register(regtype, regid)
@ -528,7 +533,7 @@ def gen_tcg_func(f, tag, regs, imms):
):
declared.append(f"{regtype}{regid}V")
if regtype == "M":
declared.append(f"{regtype}{regid}N")
declared.append("CS")
elif hex_common.is_new_val(regtype, regid, tag):
declared.append(f"{regtype}{regid}N")
else:

8
target/hexagon/idef-parser/parser-helpers.c
View File

@ -1541,10 +1541,8 @@ void gen_circ_op(Context *c,
HexValue *increment,
HexValue *modifier)
{
HexValue cs = gen_tmp(c, locp, 32, UNSIGNED);
HexValue increment_m = *increment;
increment_m = rvalue_materialize(c, locp, &increment_m);
OUT(c, locp, "gen_read_reg(", &cs, ", HEX_REG_CS0 + MuN);\n");
OUT(c,
locp,
"gen_helper_fcircadd(",
@ -1555,7 +1553,7 @@ void gen_circ_op(Context *c,
&increment_m,
", ",
modifier);
OUT(c, locp, ", ", &cs, ");\n");
OUT(c, locp, ", CS);\n");
}
HexValue gen_locnt_op(Context *c, YYLTYPE *locp, HexValue *src)
@ -2080,9 +2078,9 @@ void emit_arg(Context *c, YYLTYPE *locp, HexValue *arg)
char reg_id[5];
reg_compose(c, locp, &(arg->reg), reg_id);
EMIT_SIG(c, ", %s %s", type, reg_id);
/* MuV register requires also MuN to provide its index */
/* MuV register requires also CS for circular addressing*/
if (arg->reg.type == MODIFIER) {
EMIT_SIG(c, ", int MuN");
EMIT_SIG(c, ", TCGv CS");
}
}
break;

3
target/hexagon/macros.h
View File

@ -462,8 +462,7 @@ static inline TCGv gen_read_ireg(TCGv result, TCGv val, int shift)
#define fPM_CIRI(REG, IMM, MVAL) \
do { \
TCGv tcgv_siV = tcg_constant_tl(siV); \
gen_helper_fcircadd(REG, REG, tcgv_siV, MuV, \
hex_gpr[HEX_REG_CS0 + MuN]); \
gen_helper_fcircadd(REG, REG, tcgv_siV, MuV, CS); \
} while (0)
#else
#define fEA_IMM(IMM) do { EA = (IMM); } while (0)